Ore-screen.



A. B. MEIKLEJOHN (Y: J. R. VILLARS.

ORE SCREEN. APPLICATION FILED SEPT. 9, 1908.

935,2 l 6 Patented Sept. 28, 1909.

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- is -to provide novel and efficient means vforI miran erwies 'Parana oai/rica.

ARCHIE 15. MIKLEJOHN rAND J' ESSE R. IVILLARS, OF BUTTE, MONTANA.

cnn-SCREEN.

To all 'whom it may concern:

y Be it'known that'we, ARCHIE B. MEIKLE- .ioHN .and Jnssn R.. VILLARS, citizens of the United States of America, residing at Butte, in the county of Silverbow and.' State .of

`lyllontana, have inventednew and useful 1mprovements lin Ore- Screens, of which the following is a specification. l

This inventionrelates to ore screens,'and` one of the principal objects of theinven-tion giving a vibratory motion to the screen.

Another object of the invention is to provide a screen mounted on springs and yto ar range an electro-magnet-in proximity to a contact plate secured to vthe bottom ofthe screen, whereby an intermittent current maybe employed to alternately energize and deenergize the magnet to attract the plate and vibrate the screen and 'to release the same 4 alternately.

These and other objectsr be attained by'meansfof the constriction illustrated in,

the accompanyingA drawing, in which,- v

Figure l is a front to rear'vertical section-taken centrally through the screen. Fig.

2 is a rear elevation ofvthescreen.y Fig. 3 is a transverse vertical section. Fig. 41s aper-v spective' view 'ofthe supporting ring for the 5 is a perspective view of the magnet. Fig. contact plate.

Referring .designates the short front legs ofthe frame,

and 2 are the longer rear legsl or sup o rtf said legs being connected by-side bars., lan

cross bars 4. Supported upon'the side bars 3 is a.pair of cross bars, and lsupported upon the cross 1bars'5 are the diverging magnet-supporting arms 6. Inclined bars 7 connected at one` oftheirends tothe rear legs l2 near their upper ends are secured `at their lower lends tothe front legs ,lvnear their lower ends. Mounted on the bars 7 are the elliptical springs 8, said springsv being connected at their 4upper .sides to the screen frame 9, said frame having an inclined bottom 10 and provided withpa rabbeted upper edge for receiving the screen 11, said screen bemg secured to a rectangular'frame 12 and provided with suitable means 13 for securing said screen to the frame 9. IAn oversize` discharge opening 14 vis lprovided above the to the drawing, the. numeral 1 vSpecification of Letters Patent. Patented' Sept. 2S, QQ). Application filed September 9, 1908. Serial No. 452,218.

the upper ends of the arms 6, said keepers y being provided with set screwsl 20 for securing the trunnions 18 in adjusted positions. Supported within the ring 17 is a magnet 21, a se't screw 22 extending through the ring 17 andbearing against the magnet to hold it in place. A core 23 extends through the Vmagnet, and .the conductors 24 leadV from the' magnet .to asuitable source of electrical sup# -ply ,'providingfan alternate or direct current.

'The operation `offour invention may be brieiy described as follows The ore to be screened may either be wet or dry, and the screen is vibratedby energizing and dener-l `gizing the magnet yto draw the plate 16 to the coreagainst the tension ofthe springs Sand 'to' release thel same and allow the screen to rock and move vertically.` The screen is vibrated by the action ot' the alternating cur. 'rent which `alternately attracts and repels.

lthe plate causing rapid vibration.

-Our invention is'of comparatively simple constructioln'can be' installed at slight "cost, .operates efficiently and quickly fpr its purl pose and' gives superior results.

.Weclaimzi The herein described ore screen compris. ing a frame,.inclined bars connected to said framefa screen frame, elliptical springs con# nectedto said bars and to said screen frame, a ring provided with projecting trunnions, arms connectedvto the frame to which said trunnion's areA journaled, an electrofmagnet supported withlin said ring and provided with a core, ay contact plate on the bottom of said screen frame, and conductors leading to a sourceof eletrical supply for magnetizing and demagnetizing said magnet and core.

In-testimony whereof wer aiiiX our signatures in presence of two witnesses.

i Witnesses:

FRANK WEST, Jr., L. F. Boron. 

